Black steel sch 40 with cut grooves is in my view the best option. Gal. Pipe with any imperfection will cause localized corrosion at any point that has lost the protection of galvanized coating. Roll grooves for example.
Sent from my iPhone On Sep 19, 2012, at 11:14 AM, Todd Williams <[email protected]> wrote: > Galvanizing is a chemical bonding whereas painting is a coating. Painting may > need to be repainted over time. Since it is in a wet environment, getting a > paint to set up properly with proper coating might be an issue. However, a > couple of coats of a two-part epoxy might not be a bad alternative, but again > cold be tough to do in that environment. > > > At 12:01 PM 9/19/2012, you wrote: >> We have an UG tunnel with an existing 8" bulk main that is showing signs of >> significant corrosion - currently black pipe - unpainted. >> >> We recommended replacing the pipe with galv sch 10 - a competitor has >> recommended using blk shc 40 and painting it as being a better choice for >> corrosion protection. We disagree but would like some other input? >> >> The tunnel does have standing water on the floor most of the time so it is >> always damp. >> >> Thanks, >> Greg >> >> -- >> Greg McGahan >> Living Water Fire Protection, LLC <http://www.livingwaterfp.com> >> 1160 McKenzie Road >> Cantonment, FL 32533 >> 850-937-1850 >> fax 850-937-1852 >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120919/e51f2e06/attachment.html> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, CT > 860.535.2080 > www.fpdc.com > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
